Many people with a suprapubic catheter can still pass urine through the urethra, though whether this happens depends on why the catheter was placed and what is going on with the bladder and urethra. A suprapubic catheter drains urine through a tube inserted directly into the bladder through the lower abdominal wall, bypassing the urethra entirely. Because the urethra itself is left physically intact, urethral voiding remains possible in many cases and is sometimes actively encouraged as part of a structured process to test whether the catheter can eventually be removed.
Why the Urethra Still Works
A suprapubic catheter enters the bladder through a small puncture site in the lower abdomen, typically about two fingerbreadths above the upper edge of the pubic bone.1Journal of Visceral Surgery. Surgical technique Suprapubic catheterization The tube sits inside the bladder and drains urine into an external collection bag. The urethra, which is the natural passage from the bladder out through the genitals, is not blocked, cut, or sealed during this procedure. So in principle, if urine accumulates in the bladder faster than the catheter drains it, or if the catheter is deliberately clamped off, urine can still flow the normal way.
Whether it actually does depends on what led to catheter placement. If the catheter was placed because of a temporary problem, such as swelling after surgery or an acute urinary retention episode, the underlying cause may resolve and normal voiding may return. If it was placed because of a permanent neurological condition that prevents the bladder from contracting properly, urethral voiding might never be practical. The catheter is a drainage route, not a blockade of the urethra.
What a Voiding Trial Looks Like
Clinicians test whether someone can urinate on their own through a process called a “trial without catheter,” sometimes abbreviated TWOC. With a suprapubic catheter, this trial has a practical advantage over the same test with a urethral catheter: the tube does not need to be removed. Instead, the drainage bag is disconnected and a small valve is attached to the end of the catheter. The valve stays closed, which allows the bladder to fill naturally. You then try to urinate through the urethra in the usual way.2Urology & Continence Care Today. Suprapubic trial without catheter in community settings
If urethral voiding works well and residual urine left in the bladder afterward is acceptably low, the catheter can potentially be removed for good. If the trial fails, the valve is simply opened again or the drainage bag is reconnected, and you are back to catheter drainage without having gone through the discomfort of reinsertion. This is one of the reasons some clinicians prefer suprapubic catheters over urethral ones for patients who might regain the ability to void: the built-in safety net makes repeated trials low-stakes and painless.
The timeline for these trials varies enormously. After prostate cryoablation, for example, one prospective study found that patients with suprapubic catheters took a median of 50 days before their first successful voiding trial, compared with 20 days for patients with urethral catheters.3PubMed Central. A Prospective Study Comparing Suprapubic Catheter to Urethral Catheter on Voiding Outcomes and Complications After Whole-Gland Prostate Cryoablation for Prostate Cancer The suprapubic group also had a higher rate of urinary retention requiring further intervention, with about a quarter needing an additional procedure versus roughly one in ten in the urethral catheter group. That study is specific to post-cryoablation patients, so the numbers do not generalize to everyone with a suprapubic catheter, but it illustrates that the path back to normal voiding is not always fast or guaranteed.
Catheter Valves and Bladder Training
For people who will have a suprapubic catheter long-term, one concern is that the bladder may lose its ability to stretch and contract properly if it is continuously drained and never allowed to fill. To counter this, clinicians sometimes use catheter valves instead of free-draining bags. A valve lets you open and close the catheter manually, so the bladder fills to a normal volume before you release the urine. This mimics a more natural fill-and-empty cycle.
The perceived benefits of catheter valves include helping maintain bladder tone and capacity, and potentially reducing urinary tract infections, though the evidence base behind some of these claims remains thin.4PubMed. Catheter valves: a special focus on the Bard Flip-Flo catheter One study of long-term suprapubic catheter users found that a policy of regular catheter clamping combined with anticholinergic medication was associated with a halving of average maximum bladder pressure and improved bladder shape in most patients, while bladder capacity and kidney function were preserved.5Spinal Cord. Long-term suprapubic catheterisation: clinical outcome and satisfaction survey Keeping the bladder cycling through fill-and-empty phases appears to matter for long-term bladder health, and it also keeps the option of future urethral voiding more realistic.
If you are using a valve rather than a bag, you will periodically feel the urge to void (assuming bladder sensation is intact) and can either open the valve or attempt to urinate through the urethra. Some people do a combination of both depending on the situation. The valve approach turns the catheter from a passive drain into something more like a controlled backup system.
Leakage Around the Catheter Is Not Normal Voiding
There is an important distinction between deliberately urinating through the urethra and urine leaking around the catheter. Leakage is common and often involuntary, and it is not the same as functional voiding. In one review of spinal cord injury patients with suprapubic catheters, about a quarter experienced leakage around the catheter site.6Nature Publishing Group (Spinal Cord Series and Cases). Persistent urine leakage around a suprapubic catheter: the experience of a person with chronic tetraplegia The most frequent causes were bladder spasms, catheter blockage (either partial or complete), and bladder shrinkage from long-term catheterization.
When the catheter is blocked, urine has nowhere to go except back through the urethra or around the catheter insertion site. This can look and feel like urinating, but it is a sign that something is wrong with drainage, not that normal function has returned. Similarly, bladder spasms, which are involuntary contractions of the bladder muscle, can force urine out around the catheter or through the urethra, especially during urinary tract infections when spasms tend to worsen. If you notice sudden urethral leakage after a period of none, the first thing to check is whether the catheter is draining properly.
Neurological Conditions and Urethral Voiding
People with spinal cord injuries, multiple sclerosis, or other neurological conditions affecting bladder control face a more complicated picture. The bladder may contract involuntarily at high pressures (a condition sometimes called detrusor overactivity), or it may fail to contract at all. The sphincter that controls the urethra may not relax when it should, or it may relax when it should not. In these situations, whether you can pee through the urethra is less about physical anatomy and more about whether the nervous system can coordinate the process.
For some people with spinal cord injuries, a suprapubic catheter is chosen specifically because urethral catheterization was causing urethral damage or because intermittent catheterization was not feasible. The goal may not be to restore urethral voiding at all, but rather to protect the kidneys from dangerously high bladder pressures while preserving quality of life. One additional concern in spinal cord injury above about the T6 level is autonomic dysreflexia, a potentially dangerous spike in blood pressure triggered by bladder distension or other stimuli below the injury. Research has found that a substantial proportion of these episodes happen silently, with blood pressure climbing without the person noticing symptoms.7UroToday. Autonomic Dysreflexia: Discussion on Urologic Concerns Part 2 – Todd Linsenmeyer For this group, catheter management and voiding trials require careful medical supervision rather than at-home experimentation.
Infection, Biofilm, and the Long Game
One question people often have is whether a suprapubic catheter reduces urinary tract infections compared with a urethral catheter, and how infections interact with urethral voiding. The short answer on infection rates is disappointing: suprapubic catheters do not appear to meaningfully lower the risk of catheter-associated bacterial colonization. One study examining biofilm formation on suprapubic catheters found bacteria in the catheter biofilm in the vast majority of cases, and the types of bacteria were similar to those seen with urethral catheters.8PubMed. Microbial biofilm formation and catheter-associated bacteriuria in patients with suprapubic catheterisation The bacteria form films on the catheter surface over time regardless of where the tube enters the body.
Infections matter to voiding because a urinary tract infection often triggers increased bladder spasms, which can cause involuntary leakage through the urethra and around the catheter site. If you are in the middle of a voiding trial and develop an infection, the resulting spasms and urgency can confuse the picture, making it look like voiding has improved when in reality the bladder is just contracting uncontrollably. Clinicians often prefer to treat the infection first before assessing whether natural voiding has genuinely returned.
Sexual Activity With a Suprapubic Catheter
A suprapubic catheter’s placement on the lower abdomen rather than through the genitals is one of its frequently cited quality-of-life advantages. A qualitative study exploring how catheter users talk about sex found that participants described sexual activity as easier with a suprapubic catheter compared with a urethral one, precisely because the catheter is positioned away from the genitalia.9British Journal of General Practice. How users of indwelling urinary catheters talk about sex and sexuality: a qualitative study One participant described initial anxiety about catheter placement being too low but ultimately reported being able to enjoy sex and achieve orgasm after the catheter was repositioned slightly higher.
This is worth knowing because many people considering a suprapubic catheter worry that it will end their sexual life entirely. The catheter can be taped out of the way during intercourse, and because the urethra is free and unoccupied, there is no tube running through the genitals to interfere mechanically. The drainage bag can be emptied beforehand and secured. None of this is to say it is simple or entirely carefree, but the physical setup is more compatible with sexual activity than many people expect.
Placement Risks and Rare Complications
Because the catheter is inserted through the abdominal wall into the bladder, placement carries risks that urethral catheterization does not. The most serious is accidental bowel perforation, where the needle or trocar passes through a loop of intestine lying between the abdominal wall and the bladder. This risk increases in patients who have had prior lower abdominal surgery, because scar tissue can tether bowel loops into unusual positions. Ultrasound guidance during placement reduces this risk.10PubMed Central. Delayed bowel perforation following suprapubic catheter insertion
After robotic prostatectomy, a comparison of suprapubic versus urethral catheterization found no differences in complications such as urethral stricture or leakage at the surgical connection site.11PubMed Central. Outcomes and Safety of Suprapubic vs Urethral Catheterization Following Pelvic Fascia-Sparing Robotic Prostatectomy So while insertion itself carries some unique procedural risk, the ongoing complication profile is broadly similar between the two catheter types once they are in place.
Cancer Risk With Very Long-Term Use
A rarely discussed but real concern involves the very long-term use of indwelling catheters and cancer. Squamous cell carcinoma of the bladder, a type that accounts for only a small fraction of all bladder cancers, can develop in the setting of chronic catheterization and the sustained inflammation it causes. This has been documented both in the bladder itself and, even more rarely, directly in the suprapubic catheter tract. Fewer than ten cases of squamous cell carcinoma arising from the tract have been reported in the literature.12PubMed Central. Squamous cell carcinoma of the suprapubic tract: A rare presentation in patients with chronic indwelling urinary catheters One case report documented bladder squamous cell carcinoma developing after more than a decade of continuous suprapubic catheterization.13Indian Journal of Nuclear Medicine. From Chronic Irritation to a Rare Malignant Subtype: 18F-FDG PET/ CT Imaging of Bladder Squamous Cell Carcinoma following Long-term Suprapubic Catheterisation
These cases are extremely rare, and the risk should not alarm most people who need a suprapubic catheter for months or even a few years. But for those who have had one for a decade or longer, periodic surveillance is worth discussing with a urologist. Chronic irritation from any foreign body in the bladder creates a low-grade but ongoing stimulus for abnormal cell changes, and the longer the catheter is in place, the more that cumulative exposure matters.
When Urethral Voiding Is the Goal Versus When It Is Not
Not every suprapubic catheter is placed with the hope of eventually getting back to normal peeing. For some people, the catheter is a permanent solution. This includes those with irreversible neurological bladder dysfunction, severe urethral damage that makes catheterization through the urethra impossible, or conditions where the risks of catheter removal outweigh the benefits. In these cases, the question is not “can I still pee” but “how do I manage drainage safely and comfortably for years.”
For others, the catheter is a bridge. After certain surgeries, traumatic injuries, or acute retention episodes, the catheter buys time for healing while the voiding trial process described earlier tests readiness for removal at intervals. If you are in this group, maintaining bladder cycling through valve use, staying on top of infections, and working with your clinical team on the timing of voiding trials gives you the best shot at eventually returning to urethral voiding. The urethra has not been damaged by the catheter the way it can be by prolonged urethral catheterization, which is one of the practical reasons suprapubic catheters are sometimes preferred for people expected to recover bladder function.
If you are unsure which category you fall into, the answer is almost always in the reason the catheter was placed. Ask your urologist directly whether voiding trials are on the table and what milestones they are looking for before attempting one. In many cases, the plan is already there and just has not been communicated clearly.